New South African Covid Variants, Omicron BA.4 And BA.5, Found In U.S. For First Time; May Be More Transmissible Than BA.2

On November 9, 2021, the first case of a new Covid variant was detected in South Africa. On November 26, with cases rising across that country, the World Health Organization declared it a “variant of concern,” noting a likely increased transmissibility. They called it Omicron. By December 1, the first cases were … Read entire story.

Source: Deadline